Solving the Lincoln Problem

A poor early 19th-century Kentuckian boy splits logs from 6 a.m. to 7 p.m. If he splits sixty-five
logs every half hour and then takes a five-minute break, what is the likelihood
that his math homework will wind up in Harvard University’s Houghton Rare Book
Library? If that boy was Abraham Lincoln, up until several months ago the odds
were good. Now they’re certain.

Two professors at Illinois
State University have confirmed that a sheet of arithmetic problems and
solutions belonging to the Houghton Library was written by our sixteenth
president sometime between his eleventh and seventeenth birthdays. Exercises on the page are simple. One
asks, “If 4 men in 5 days eat 7 lb. of bread, how much will be sufficient for
16 men in 15 days?” Sources confirm that most of the problems were solved correctly.

Houghton’s leaf left the
Lincoln family a year after the President was assassinated in 1865. Lincoln’s
stepmother, Sarah Bush Johnston Lincoln, gave the leaf to Lincoln’s former law
partner, William Henry Herndon. Herndon was collecting Lincoln material for what
would become the biography Herndon’s
Lincoln: The True Story of a Great Life, whichwas published nearly two and a half decades after he was given the
leaf. Over the next half century, the validity of the leaf’s origin was lost.

By the time it was donated
to the Houghton Library in 1954, it was only a curiosity, but now no longer. The
leaf has been confirmed as belonging to a set of ten other known Lincoln
arithmetic pages. Together, they form the earliest known Lincoln manuscript in
existence.

Photo Credit: Houghton Rare Book Library

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A poor early 19th-century Kentuckian boy splits logs from 6 a.m. to 7 p.m. If he splits sixty-five
logs every half hour and then takes a five-minute break, what is the likelihood
that his math homework will wind up in Harvard University's Houghton Rare Book
Library? If that boy was Abraham Lincoln, up until several months ago the odds
were good. Now they're certain.

Two professors at Illinois
State University have confirmed that a sheet of arithmetic problems and
solutions belonging to the Houghton Library was written by our sixteenth
president sometime between his eleventh and seventeenth birthdays. Exercises on the page are simple. One
asks, "If 4 men in 5 days eat 7 lb. of bread, how much will be sufficient for
16 men in 15 days?" Sources confirm that most of the problems were solved correctly.

Houghton's leaf left the
Lincoln family a year after the President was assassinated in 1865. Lincoln's
stepmother, Sarah Bush Johnston Lincoln, gave the leaf to Lincoln's former law
partner, William Henry Herndon. Herndon was collecting Lincoln material for what
would become the biography Herndon's
Lincoln: The True Story of a Great Life, whichwas published nearly two and a half decades after he was given the
leaf. Over the next half century, the validity of the leaf's origin was lost.

By the time it was donated
to the Houghton Library in 1954, it was only a curiosity, but now no longer. The
leaf has been confirmed as belonging to a set of ten other known Lincoln
arithmetic pages. Together, they form the earliest known Lincoln manuscript in
existence.